Sliding-door-locking device.



J. KOHN. SLIDING DOOR LOCKING DEVICE.

APPLICATION FILED MAY 3, 1910.

967,787. Pat ented Aug. 16,1910.

3 SHEETS-SHEET 1.

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SLIDING DOOR LOCKING DEVICE.

APPLICATION FILED nus, 1910.

Patented Aug. 16, 1910.

3 SHEETS-SHEET 2.

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J. KOHN.

SLIDING DOOR LOOKING DEVICE.

ABPLIOATION FILED MAY 3, 1910.

967,787, Patented Aug. 16, 1910.

3 SHEETS-SHEET 3.

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JACOB KOI-IN, OF NEW YORK, N. Y.

SLIDING-DOOR-LOCKIN G DEVICE.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application filed May 3, 1910. Serial N 0. 559,056.

To all whom it may concern:

Be it known that I, JACOB KOHN, a subject of the King of Hungary, and aresident of the city of New York, borough of Manhattan, in the countyand State of New York, have invented a new and ImprovedSliding-Door-Locking Device, of which the following is a full, clear,and exact description.

The object of the invention is to provide a new and improved slidingdoor locking de vice, more especially designed for use on the doorsleading to elevator shafts and the like, and arranged to securely holdthedoor locked against opening by a person intending to make use of theelevator, to allow the elevator attendant to readily unlock the door andopen the same for the ingress and egress of the passengers, and topermit of locking the door for the night both from the loft side of thebuilding and the elevator cage, to prevent opening of the door fromeither side by unauthorized persons. For the purpose mentioned, use ismade of pivotally connected links, of which one is the door casing linkand is pivoted on the door casing, and the other is thedoor link and ispivoted on the door, the said links when eX- tended standing at anobtuse angle at the time the door is closed, and the said links whenclosed standing at an acute angle at the time the door is open, and thesaid door link is adapted to be locked against movement when the door isclosed by a lock on the door.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a face view of the door'and door locking device from theinside of the loft of the building, and showing the door and lockingdevice in closed or locked position; Fig. 2 is a like view of the sameshowing the door and locking device in open position; Fig. 3 is a faceview of the door from the inside of the elevator shaft and showing thedoor and locking device in closed position; Fig. 4 is an enlarged faceview of the same; Fig. 5 is an enlarged face view of the lock as viewedfrom the loft side, the lock casing being shown in section; Figs. 6, 7,8 and 9 are like views of the same, showing the parts in differentpositions; Fig. 10 is a face view of the look as viewed, from inside theelevator shaft, the cover being removed; Fig. 11 is a sectional planview of the lock on the line l1l1 of Fig. 5; Fig. 12 is a similar viewof the same on the line 1212 of Fig. 10; Fig. 13 is a like view of thesame showing the parts in unlocked position; Fig. 141 is a cross sectionof the lock on the line 1t-l4 of Fig. 5; Fig. 15 is a rear face view ofthe lock tumbler; F ig. 16 is a similar view of the key-controlled leverfor opening the locking bolt from the loft side of the door; Fig. 17 isa face view of a modified form of the lock, the casing being shown insection; and Fig. 18 is an edge view of the sliding catch for the lockshown in Fig. 17.

The sliding door A, for connecting and disconnecting a loft with anelevator shaft, is mounted to slide in the usual manner on suitableguideways arranged on the door casing B, and on the door A is attached alock G connected at the loft side of the door A by pairs of links D, Dwith a bracket E attached to the jamb of the door casing B, as plainlyshown in Figs. 1 and 2. The links D are the door links, while the linksD are the door casing links, and the links D, D of each pair of linksare pivotally connected with each other, and the links D are pivoted attheir free ends on a pivot G fixed in the casing G of the door lock C,while the free ends of the door casing links D are pivoted on the pivotE of the bracket E. When the door A is closed, as shown in Fig. 1, thenthe links D, D are extended and stand at an obtuse angle one to theother, and when the door A is open, as shown in Fig. 2, and the links D,D are closed or folded they stand at an acute angle one to the other.The links D, D are provided with extensions D projecting beyond thepivot G into the lock casing 0 and when the door A is in a closedposition then the extensions D overlie one the other, that is, arefolded or closed (see Figs. 5, 6, 7, 9, 11, 12 and 18), and when thedoor A is opened then the said extensions D are swung apart into an open.oblique position, as indicated in Fig. 8. The

extensions D when folded one on the other are adapted to be engaged by acatch F, having a longitudinally-extending groove F for receiving thefolded extensions D to hold the links D, D locked in extended positionand thus hold the door closed and locked. The catch F is pivoted at F onthe casing C (see Figs. 10, 12 and 13) and is pressed on by a spring Fto normally hold the catch. F in the path of the link exten sions D andthe catch F is beveled on opposite sides of the groove F, so that when isides of the catch F and impart a swinging motion to the latter againstthe tension of the spring F (see Fig. 13), and when the link extensionsD finally pass into the closed position one over the other, in registerwith the groove F, then the catch F swings back to its normal positionby the action of the spring F to engage the cam groove F with the linkextensions 1) and thus lock the links D, D in the extended position,that is, at the time the door A is closed.

The catch F is provided with a lug F connected by a link Gr (see Figs.10, 11, 12 and 13) with a lever H fulcrumed at H on the casing C and thefree end of the lever H is engaged by a transverse pin 1 projecting froma hand lever I, fulcrumed at I on the lock casing C (see Fig. 4), andpressed on by a spring I to normally hold the hand lever I in a forwardposition, a portion of the hand lever projecting into a recess G formedin the lock casing G at the shaft or elevator side of the door, so thatthe elevator attendant can engage and press the hand-lever I in thedirection of the arrow a (see Figs. 3 and 4:), to swing the catch F outof engagement with the link extensions D with a view to allow theelevator attendant to slide the now unlocked door open on furtherpressing in the direction of the arrow a. When the door is moved shut,then the links D, D are extended and consequently the link extensions Dengage the spring-pressed catch F and impart a swinging motion thereto,until the extensions D overlie each other, at which time the catch isreturned by the pressure of its spring F to snap the catch F inengagement with the said overlying extensions D thus locking the dooragainst opening. When the door is not to be used, say overnight, and itis desired to lock the door against opening by unauthorized personseither from the loft side or from .the elevator shaft, use is made ofkey-controlled mechanisms presently to be described in detail.

On one side of the catch F is formed an under cut or a notch F (seeFigs. 8 and 11) adapted to be engaged by a bolt J, mounted to slide inthe casing C and controlled in the usual manner by a key K inserted inthe lock casing from the loft side of the building. The bolt J isnormally locked in either of its two positions by a tumbler L,controlled by the key K and pivoted at L in the casing C and pressed onby a spring L The tumbler L engages a post N when in thelocked orunlocked position (see for comparison Figs. 5 and 8), it beingunderstood that in order to move the bolt J into and out of engagementwith the under cut F bythe use of the key K, the latter lifts thetumbler L out of engagement with the post N prior to sliding the bolt Jforward or backward. The key K may be used to impart a swinging motionto the catch F to disengage the same from the extensions D after thebolt J is withdrawn from the under cut F and for this purpose use ismade of a lever O, fulcrumed at O on the bolt J and moving with thesame, the said lever 0 being adapted to engage an arm P secured to thelink G at its pivotal connection with the lever H. The lever 11 standsin active position at the time the bolt J is withdrawn, so that ongiving the key K a further half turn it engages the lever O and impartsa swinging motion thereto, thus pushing the arm P to the right andthereby moving the link G in a like direction, to swing the catch F intodisengaging position relative to the link extensions D to permit ofopening the door A from the inside of the loft by a person havingpossession of the key K. The tumbler L is also adapted to be engaged byan arm Q, attached to the spindle R of a Yale or a similar lock R,mounted on the casing C and extending to the loft side of the door, sothat the elevator attendant by the use of a key can manipulate the lockR, to swing the arm Q in engagement with the tumbler L to unlock thebolt J and to shift the latter forward or backward to engage ordisengage the under cut F that is, to lock or unlock the catch F. Whenthe catch F is unlocked by the attendant, the latter can swing the catchinto an open position by actuating the lever I, as previously explained.

Thus from the foregoing it will be seen that by the mechanism described,the door is securely held against opening by a person intending to makeuse of the elevator, and the owner of the loft, by the use of the properkey, can lock the door against opening overnight, to preventunauthorized persons from opening the door, and the elevator attendantcan unlock the door by the use of the proper key from inside of theshaft, as before explained.

In the modified form shown in Figs. 17 and 18, the link extensions D areadapted to be engaged by a guideway S formed in a bolt S, mounted toslide in the casing C the said bolt S being controlled by a key T, whichalso controls a tumbler U enga ing a fixed post U, to lock the bolt 5 ineither of its two positions, until the tumbler U is swung open by theuse of the key T. The key T is to be used from the inside of the loft,while a Yale lock, such as the lock R previously described, is employedat the elearm V, to actuate the tumbler U, and to shift the bolt Sso asto move the guideway S thereof into or out of engagement with theoverlying extensions 1) of the links Having thus described my invention,I claim as new and desire to secure by Letters Patent: v

1. A locking device for sliding doors of elevator shafts, comprising adoor casing link and a door link, the links being pivotally connectedwith each other, and the door casing link being pivoted at its outer endto the door casing, and the door link being pivoted at its outer end onthe sliding door, the said links when extended standing at an obtuseangle at the time the door is closed, and the links when closed standingat an acute angle at the time the door is open, and means on the doorengaging the door link at the door to lock the links in the extendedposition and holding the door against opening.

2. A locking device for sliding doors of elevator shafts, comprisingpivotally connected links, of which one is the door casing link andpivoted on the door casing, and the other is the door link and ispivoted on the door, and a key and hand-controlled lock on the door andhaving means for engaging the door lock to lock the links in an extendedposition and thereby holding the door closed, the said means whendisengaged from the door link allowing of closing the links and openingof the door.

3. A locking device for sliding doors of elevator shafts, comprisingpivotally connected links, of which one is the door casing link andpivoted on the door casing, and the other is the door link and ispivoted on the door, the said links when extended standing at an obtuseangle at the time the door is closed and the links when closed standingat an acute angle at the time the door is open, the said door linkhaving an extension projecting beyond the pivot on the door, a catch onthe door for engaging the said link extension, and a hand lever on thedoor connected with the said catch for withdrawing the latter from thelink extension.

4. A locking device for sliding doors of elevator shafts, comprisingpivotally connected links, of which one is the door casing link andpivoted on the door casing, and the other is the door link and ispivoted on the door, the said links when extended standing at an obtuseangle at the time the door is closed and the links when closed standingat an acute angle at the time the door is open, the said door linkhaving an extension projecting beyond the pivot 011 the door, a catch onthe door for engaging the said link, and key-controlled means on thedoor for locking and unlocking the said catch.

5. A locking device for sliding doors of elevator shafts, comprisingpivotally connected links, of which one is the door casing link andpivoted on the door casing, and the other is the door link and ispivoted on the door, the said links when extended standing at an obtuseangle at the time the door is closed and the links when closed standingat an acute angle at the time the door is open, the said door linkhaving an extension projecting beyond the pivot on the door, a catch onthe door for engaging the said link, key-controlled means 011 the doorfor lock-' ing or unlocking the said catch, and keycontrolled means foractuating the said catch, both key-controlled means being actuated bythe same key.

6. A locking device for sliding doors of elevator shafts, comprisingpivotally connected links, of which one is the door casing link andpivoted on the door casing, and the other is the door link and ispivoted 011 the door, the said links when extended standing at an obtuseangle at the time the door is closed, and the links when closed standingat an acute angle at the time the door is open, the said door linkhaving an extension projecting beyond the pivot on the door, aspring-pressed catch on the door for engaging and disengaging the saidlink extension, a hand-controlled device connected with the said catchfor disengaging the said catch from the link extension, a key-controlledbolt on the door for locking the catch in locking position, and akey-controlled tumbler for locking the said bolt against movement whenthe bolt is in either of its locked or its unlocked positions.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JACOB KOHN.

WVitnesses THno. Gr. HosrER, PHILIP D. RoLLHAUs.

